This warning also seems to be new:

	net/ipv6/addrconf.c: In function ‘addrconf_add_linklocal’:
	net/ipv6/addrconf.c:2318: warning: unused variable ‘net’

and looking at the code it's apparently because I'm not an optimistic 
enough dad.

But hey, if you had three pre-teenage girls, you might not be all that 
optimistic either. So I think that's reasonable.

Problem seems to have been introduced by 53b7997f ("ipv6 netns: Make 
several "global" sysctl variables namespace aware")

		Linus